Back out bug 765637 / 7fff0a956f15
Bug 724522 Don't prompt twice when we can't save a draft message. r=irving,ui-r=bwinton
Bug 807848 - Use 'toolkit.telemetry.prompted' pref as Int - stage 1, cope with the pref being Bool or Int and save it as Int. r=standard8
Bug 881054 - Remove obsolete Sunbird preference files. r=philipp